On Tue, Apr 12, 2022 at 09:26:58AM +0200, Richard Biener wrote: > On Tue, Apr 12, 2022 at 9:07 AM Richard Biener > <richard.guent...@gmail.com> wrote: > > > > On Tue, Apr 12, 2022 at 1:53 AM Steve Kargl via Gcc <gcc@gcc.gnu.org> wrote: > > > > > > If I configure gcc with the following > > > > > > ../gccx/configure --prefix=$HOME/work/x --enable-languages=c,c++,fortran \ > > > --enable-bootstrap --disable-nls --enable-checking --disable-multilib \ > > > --disable-libsanitizer --disable-lto. > > > > > > then bootstrap gcc, why do I see 1000s of failures with > > > > > > % cd gcc > > > % gmake -j7 check-c > > > ... > > > FAIL: gcc.dg/torture/pr64365.c -O2 -flto (test for excess errors) > > > FAIL: gcc.dg/torture/pr61786.c -O2 -flto (test for excess errors) > > > FAIL: gcc.dg/torture/pr63380-2.c -O2 -flto (test for excess errors) > > > FAIL: gcc.dg/torture/pr65270-2.c -O2 -flto (test for excess errors) > > > > > > Should the testsuite recognize that gcc is built without LTO support? > > > > Yes, it does, in testsuite/lib/gcc-dg.exp > > > > if [info exists TORTURE_OPTIONS] { > > set DG_TORTURE_OPTIONS $TORTURE_OPTIONS > > } else { > > # It is theoretically beneficial to group all of the O2/O3 options > > together, > > # as in many cases the compiler will generate identical executables for > > # all of them--and the c-torture testsuite will skip testing identical > > # executables multiple times. > > # Also note that -finline-functions is explicitly included in one of the > > # items below, even though -O3 is also specified, because some ports may > > # choose to disable inlining functions by default, even when optimizing. > > set DG_TORTURE_OPTIONS [list \ > > { -O0 } \ > > { -O1 } \ > > { -O2 } \ > > { -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops > > -ftracer -finline-functions } \ > > { -O3 -g } \ > > { -Os } ] > > > > if [check_effective_target_lto] { > > # When having plugin test both slim and fat LTO and plugin/nonplugin > > # path. > > if [check_linker_plugin_available] { > > set LTO_TORTURE_OPTIONS [list \ > > { -O2 -flto -fno-use-linker-plugin -flto-partition=none } \ > > { -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects } > > ] > > } else { > > set LTO_TORTURE_OPTIONS [list \ > > { -O2 -flto -flto-partition=none } \ > > { -O2 -flto } > > ] > > } > > > > so either TORTURE_OPTIONS is set or check_effective_target_lto doesn't work. > > The check does simply > > > > return [check_no_compiler_messages lto object { > > void foo (void) { } > > } "-flto"] > > > > so I wonder what your excess errors are? The check above should also > > leave traces > > in the testsuite log. It might be that --disable-lto doesn't disable > > gcc -c -flto but just > > disables lto1 building though. > > I checked and it works fine for me, --disable-lto disables LTO support > and there's > no extra FAILs in dg-torture.exp. The testsuite log has > > Executing on host: /tmp/obj/gcc/xgcc -B/tmp/obj/gcc/ > -fdiagnostics-plain-output -flto -c -o lto10207.o lto10207.c > (timeout = 300) > spawn -ignore SIGHUP /tmp/obj/gcc/xgcc -B/tmp/obj/gcc/ > -fdiagnostics-plain-output -flto -c -o lto10207.o lto10207.c^M > cc1: error: LTO support has not been enabled in this configuration^M > compiler exited with status 1 > > which causes no -flto to be used. >
Well, I determined what the problem is. On FreeBSD, GNU make is gmake. make(1) on FreeBSD is BSD make. % gmake -j7 check-c Does not pass down the name of the invoking command to sub-make jobs. 4000+ FAILs had the form make[2]: illegal argument to -j -- must be positive integer! FAIL ... Well, that's an error message from BSD make. If I do % setenv MAKE gmake % gmake -j7 check-c 4000+ FAILS disappear, so it's good that he environmental variable MAKE is honored. I know in the past I did not need to sete MAKE. With LTO disabled and MAKE set, I see === gcc Summary === # of expected passes 175408 # of unexpected failures 1078 # of unexpected successes 20 # of expected failures 1459 # of unresolved testcases 10 # of unsupported tests 3248 /usr/home/sgk/gcc/objx/gcc/xgcc version 12.0.1 20220411 (experimental) (GCC) -- Steve